1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '30mrlfcpdo2ih7op2olienu3a0', '54.198.52.82', '1537745220', '1537745220', '/catalog/default.php?cPath=53&osCsid=mm38bmhp5mf2uqcnkq644vprg1')

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